Heat Transfer Model Optimization And Simulation Of Ground Source Heat Pump’s Underground Pipe

Development and promotion of the use of heat pumps have great practical significance for relieving the energy shortage and reducing pollution emissions. According to heat pump concept, classification, current situation of research, this article develops and elaborates ground source heat pump, and further conducts ground source heat pump economic analysis. The purpose of this study is to explore the distribution of the temperature inside and outside of the borehole, Scope of the study from ground heat pump system to underground pipe. Including the differences between vertical pipe and horizontal pipe, the main factors affecting the performance of a vertical heat exchanger, effect of drill spacing and arrangement of pipe heat exchanger for heat transfer, the concept of zoning operation of multiple borehole ground heat exchangers. The heat balance analysis indicates that after persons use of ground source heat pump several years, due to soil temperature imbalance caused by soil thermal imbalance, leading to reduced water content, soil compaction, reduced efficiency of soil source heat pump system or even failure. The heat transfer section including conduction, convection, radiation., Single-value conditions described thermal heat conduction equations and differential equations, Simulating transient heat transfer process of drilling inside and outside, Wherein the borehole heat transfer includes one-, two-, three-dimensional heat transfer theory.This article apply theoretical and numerical simulation approach, This article uses comsol system simulation software to finite element analysis of a variety of heat transfer model, Simulate transient heat transfer process of drilling inside and outside, Obtain results of temperature profile and isotherm maps under certain conditions of time and the temperature distribution of the variation with time.